Hi @lguyot and @faichele,
Thank you for your replies!
@faichele, you are right and I have now filed a feature request (On Atlassian, not bitbucket? - Bitbucket says this when I try to submit anything: "This issue tracker is obsolete. Please use https://hbpneurorobotics.atlassian.net")
Feature request can be found here: https://hbpneurorobotics.atlassian.net/browse/NUIT-34
The feature I've described is at the heart of my project so I initially intended to implement the muscle system myself, from scratch. However, seeing how I struggled with only the simple aspects of it (coloring the muscles) then I will probably choose a path that doesn't involve this feature anyway, for now.
With that said, I believe it is quite an important feature for any bio-inspired motor control system that seeks to run on a robotic platform, so I would say that it is well worth some effort.
Finally: Can you dare to make an estimate of how troublesome it would be to implement this? I may attempt it myself if you are optimistic about it
Cheers and thanks for all your help